Electrospinning Superhydrophobic Fibers Using Surface Segregating End-Functionalized Polymer Additives
Electrospinning Superhydrophobic Fibers Using Surface Segregating End-Functionalized Polymer Additives
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DOI：
10.1021/ma200852z
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发表时间：
2011-08-23
期刊：
影响因子：
5.5
通讯作者：
Hutchings, Lian R.
中科院分区：
文献类型：
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作者：
Hardman, Sarah J.;Muhamad-Sarih, Norazilawati;Hutchings, Lian R.
我们在这里描述了一种原位改性纤维表面性能的简便途径，该纤维是通过静电纺丝聚苯乙烯生产的，其中含有少量相容性聚合物添加剂，并用 1-3 个氟烷基进行末端官能化。此类添加剂在静电纺丝过程中会发生自发的表面偏析，从而产生具有低表面能、富氟、超疏水表面的纤维。使用静态接触角测量（以水作为接触流体）和 X 射线光电子能谱分析表面特性。我们报告了许多参数对所得聚苯乙烯纤维表面性能的影响，包括官能化添加剂的分子量和浓度、氟烷基的数量、退火的影响和纺丝溶剂。大多数纤维都是使用 THF 作为纺丝溶剂成功生产的，并且可以获得接触角接近 150 度的纤维。然而，初步研究使用聚苯乙烯和 4 wt% 此类添加剂的混合物，并在 DMF/THF（3:1 v/v）混合溶剂中用 3 个 C8F17 基团进行末端官能化，得到了具有超疏水表面和 158 度接触角的纤维垫。
We describe here a facile route for the in situ modification of the surface properties of fibers produced by electrospinning polystyrene containing small quantities of compatible polymer additives, end-functionalized with 1-3 fluoroalkyl groups. Such additives undergo spontaneous surface segregation during the electrospinning process, resulting in fibers with low surface energy, fluorine-rich, superhydrophobic surfaces. Surface properties were analyzed using static contact angle measurements (with water as the contact fluid) and X-ray photoelectron spectroscopy. We report the effect of a number of parameters on the surface properties of the resulting polystyrene fibers including the molecular weight and concentration of functionalized additive, the number of fluoroalkyl groups, the effect of annealing, and spinning solvent. The majority of the fibers were successfully produced using THF as the spinning solvent and fibers with a contact angle of similar to 150 degrees were attainable. However, preliminary investigations using a blend of polystyrene and 4 wt % of such an additive, end-functionalized with 3 C8F17 groups in a mixed solvent of DMF/THF (3:1 v/v), resulted in a mat of fibers with a superhydrophobic surface and a contact angle of 158 degrees.